EMAE 160 Final Review CWRU questions and answers graded A+

What is the RPM equation? - Answer-RPM=(12*cutting speed)/(π*tool diameter) What is the feed rate equation? - Answer-feed rate=RPM*flutes*chip per tooth Describe broaching and provide an example of its application. - Answer-A broach has teeth that go from rough to fine that picks away at metal. It can be used to create a square keyway. A cutting edge that can hold up under high temperatures experienced at the chip-tool interface possesses a quality called what? - Answer-Hot Hardening What is the function of reaming? - Answer-To improve tolerance on a drilled hole. Of the following metal cutting conditions, which has the greatest effect on tool wear? a) cutting speed b) depth of cut c) feed rate - Answer-a) cutting speed Describe/sketch the difference between climb (down) milling and conventional (up) milling. - AnswerCreepy Quizlet algorithm found this image for me automatically so here. Decribe the difference between peripheral milling and face milling. - Answer-Peripheral milling spins on an axis parallel to the face being cut. Face milling spins on an axis perpendicular to the face being cut. What is a procedure applied to worn grinding wheels to expose fresh abrasive grit and remove chips that have clogged the wheel? - Answer-Dressing What is similar to dressing, but also restores the ideal cylindrical shape of the grinding wheel? - AnswerTruingState three reasons that machining is commercially and technologically important. - Answer-Can achieve tight tolerances, high surface finish, can be used on many metals, can create many shapes. List four parameters of machining that are included within the scope of "cutting conditions". - AnswerCutting speed, feed rate, depth of cut, cutting fluid chosen. Identify three desirable properties of a cutting tool material. - Answer-Toughness, hot hardness, and wear resistance. Why are surface and cylindrical grinding processes technologically and commercially important? - Answer-High accuracy, removes chips, higher cutting speed. Describe knurling and its application. - Answer-A diamond shaped criss cross pattern turned or rolled into a surface to increase grip-ability. It is done on a lathe. What material is the most commonly used abrasive in grinding wheels? - Answer-Aluminum oxide What does the designation "12 in x 36 in" mean in reference to a lathe? - Answer-It refers to the maximum dimensions that the lathe can handle. 12 in diameter and 36 in long. Which abrasive material is most appropriate for grinding hardened steel? - Answer-Aluminum oxide What are the two materials known as "suber abrasives"? - Answer-Cubic boron nitride & diamond Name the three types of cutting fluid according to chemistry. - Answer-Minerals, semi-synthetic, synthetic Find the appropriate feed rate (inches per minute) when using a 0.75", 4 flute, high speed steel end mill. - Answer-Beats me lol Name the three most common machining processes. - Answer-Turning, drilling, and millingHow is feed rate denoted for a manual lathe and drill press? - Answer-in/rev What is barstock? - Answer-Raw purified metal. Usually long and of a constant cross section. What is a blind hole? What is undesirable about a blind hole? - Answer-A blind hole is a hole that goes down a certain depth but not all the way through a part. It has a pointed bottom and not a flat one